21365685

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{2539}}^1$

素因数の和:2578

約数の個数: 48

約数和(自身を含む): 42793920

約数和(自身を除く): 21428235

約数列:

[1, 3, 5, 9, 11, 15, 17, 33, 45, 51, 55, 85, 99, 153, 165, 187, 255, 495, 561, 765, 935, 1683, 2539, 2805, 7617, 8415, 12695, 22851, 27929, 38085, 43163, 83787, 114255, 129489, 139645, 215815, 251361, 388467, 418935, 474793, 647445, 1256805, 1424379, 1942335, 2373965, 4273137, 7121895, 21365685]

約数ペア:

[(1, 21365685), (3, 7121895), (5, 4273137), (9, 2373965), (11, 1942335), (15, 1424379), (17, 1256805), (33, 647445), (45, 474793), (51, 418935), (55, 388467), (85, 251361), (99, 215815), (153, 139645), (165, 129489), (187, 114255), (255, 83787), (495, 43163), (561, 38085), (765, 27929), (935, 22851), (1683, 12695), (2539, 8415), (2805, 7617)]